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#ifndef QMLCONTEXT_P_H
#define QMLCONTEXT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qmlcontext.h"

#include "qmldeclarativedata_p.h"
#include "qmlengine_p.h"
#include "qmlintegercache_p.h"
#include "qmltypenamecache_p.h"

#include <QtCore/qhash.h>
#include <QtScript/qscriptvalue.h>
#include <QtCore/qset.h>

#include <private/qobject_p.h>
#include "qmlguard_p.h"

QT_BEGIN_NAMESPACE

class QmlContext;
class QmlExpression;
class QmlEngine;
class QmlExpression;
class QmlExpressionPrivate;
class QmlAbstractExpression;
class QmlBinding_Id;
class QmlCompiledBindings;

class Q_DECLARATIVE_EXPORT QmlContextPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QmlContext)
public:
    QmlContextPrivate();

    QmlContext *parent;
    QmlEngine *engine;

    bool isInternal;

    QmlIntegerCache *propertyNames;
    QList<QVariant> propertyValues;
    int notifyIndex;

    QObjectList defaultObjects;
    int highPriorityCount;

    QList<QScriptValue> scripts;
    void addScript(const QmlParser::Object::ScriptBlock &, QObject *);

    QUrl url;

    QmlTypeNameCache *imports;

    void init();

    void invalidateEngines();
    void refreshExpressions();
    QSet<QmlContext *> childContexts;

    QmlAbstractExpression *expressions;

    QmlDeclarativeData *contextObjects;

    struct IdNotifier 
    {
        inline IdNotifier();
        inline ~IdNotifier();
        
        inline void clear();

        IdNotifier *next;
        IdNotifier**prev;
        QObject *target;
        int methodIndex;
    };

    struct ContextGuard : public QmlGuard<QObject>
    {
        inline ContextGuard();
        inline ContextGuard &operator=(QObject *obj);
        inline virtual void objectDestroyed(QObject *);

        QmlContextPrivate *priv;
        IdNotifier *bindings;
    };
    ContextGuard *idValues;
    int idValueCount;
    void setIdProperty(int, QObject *);
    void setIdPropertyData(QmlIntegerCache *);
    void destroyed(ContextGuard *);

    static QmlContextPrivate *get(QmlContext *context) {
        return static_cast<QmlContextPrivate *>(QObjectPrivate::get(context));
    }
    static QmlContext *get(QmlContextPrivate *context) {
        return static_cast<QmlContext *>(context->q_func());
    }

    QmlCompiledBindings *optimizedBindings;

    // Only used for debugging
    QList<QPointer<QObject> > instances;
};

QmlContextPrivate::IdNotifier::IdNotifier()
: next(0), prev(0), target(0), methodIndex(-1)
{
}

QmlContextPrivate::IdNotifier::~IdNotifier()
{
    clear();
}

void QmlContextPrivate::IdNotifier::clear()
{
    if (next) next->prev = prev;
    if (prev) *prev = next;
    next = 0; prev = 0; target = 0;
    methodIndex = -1;
}

QmlContextPrivate::ContextGuard::ContextGuard() 
: priv(0), bindings(0) 
{
}

QmlContextPrivate::ContextGuard &QmlContextPrivate::ContextGuard::operator=(QObject *obj) 
{
    (QmlGuard<QObject>&)*this = obj; return *this;
}

void QmlContextPrivate::ContextGuard::objectDestroyed(QObject *) 
{ 
    priv->destroyed(this); 
}

QT_END_NAMESPACE

#endif // QMLCONTEXT_P_H